Rotational movements of mandibular two-implant overdentures

  1. Suguru Kimoto1,2,
  2. Shaoxia Pan1,3,
  3. Nicolas Drolet1,
  4. Jocelyne S. Feine1,4,5

Article first published online: 15 JUN 2009

DOI: 10.1111/j.1600-0501.2009.01723.x

Issue

Clinical Oral Implants Research

Clinical Oral Implants Research

Volume 20, Issue 8, pages 838–843, August 2009

Additional Information

How to Cite

Kimoto, S., Pan, S., Drolet, N. and Feine, J. S. (2009), Rotational movements of mandibular two-implant overdentures. Clinical Oral Implants Research, 20: 838–843. doi: 10.1111/j.1600-0501.2009.01723.x

Author Information

  1. 1

    Faculty of Dentistry, McGill University, Montreal, QC, Canada

  2. 2

    Department of Gnatho-Oral Prosthodontic Rehabilitation, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba, Japan

  3. 3

    Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing, China

  4. 4

    Department of Epidemiology and Biostatistics, Faculty of Medicine, McGill University, Montreal, QC, Canada

  5. 5

    Department of Oncology, Faculty of Medicine, McGill University Montreal, QC, Canada

*Correspondence to: Jocelyne S. Feine Department of Epidemiology and Biostatistics Faculty of Medicine McGill University Montreal QC Canada Tel.: +514 398 7203, ext. 00052 Fax: +514 398 7220 e-mail: jocelyne.feine@mcgill.ca

Publication History

  1. Issue published online: 7 JUL 2009
  2. Article first published online: 15 JUN 2009
  3. Date: Accepted 23 February 2009

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Keywords:

  • implant;
  • overdenture;
  • perceived chewing ability;
  • rotation;
  • two-ball attachment

Abstract

Objectives: Clinicians have reported that their patients complain that their mandibular two-implant overdentures (IOD) rotate. Therefore, we studied the frequency and severity of rotation of IODs with two-ball attachments, how rotation may influence perceived satisfaction ratings of chewing ability, and the factors that are involved in the rotation of IODs.

Material and methods: Seventy-nine participants were recruited and asked to rate their general satisfaction of their IODs, as well as their ability to chew foods, the existence of any mandibular denture rotation, and to what degree denture rotation bothered them. Data on participant sociodemographic, anatomical, and prosthesis characteristics were also collected. Student's t-test and logistic regression analyses were performed to analyze the differences between participants who did (R group) and did not report (NR group) denture rotation.

Results: Thirty-seven of 79 participants were aware of rotational movement in their IODs. These patients were significantly less satisfied with their chewing ability than those who felt no rotation (69.1 mm R group vs. 82.9 mm), and discomfort caused by the rotation bothered them moderately (39/100 mm). The multivariate logistic regression analysis revealed that the arrangement of the anterior teeth and the length of the denture are significantly associated with awareness of denture rotation. Thirty-eight percent in the R group and 31% in the NR group had non-scheduled visits.

Conclusions: Rotational movement with a mandibular two-IOD has a negative effect on perceived chewing ability and is associated with anterior tooth arrangement and denture length.

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